Basically all of those companies are regulated, and none of them can cut you off, because you did something stupid. You can even murder someone, and they can't cut you off.
Well yeah, sometimes. In some countries (i believe france), they can only limit power to lightning (a couple of hundred watts limit, so not totally off) if you don't pay, and if your only cooking appliance is using electricity (electric stove), they can't even limit that.
(And if you wanna be snarky and say "what about your ISP" I can choose to use different ISPs. And even that is getting threatened.)